I have no idea how Apple selects its iPad App of the Week. But, I was delighted to see the app selected this week was one that I selected last month for my personal mobile blogging toolkit:
While I selected it for my toolkit based on its ability to quickly resize a photo for posting to a blog directly from an iPad, it also has a rich and varied set of preset photo modifiers to help you provide more impact or just have fun. All of these modifications are done very quickly on the iPad. You can go through a series of changes to see what works best at a pace of a second or two per modifier. I think it was $3.99 well spent for me.
Photogene for iPad (iTunes App Store)